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Grokking the Coding Interview Patterns in Go

Reverse Linked List II

Explore how to reverse a segment of a singly linked list defined by two positions, left and right. Understand the problem constraints and practice implementing an in-place reversal solution, enhancing your ability to manipulate linked lists efficiently in coding interviews.

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Statement

Given a singly linked list with nn nodes and two positions, left and right, the objective is to reverse the nodes of the list from left to right. Return the modified list.

Constraints:

  • 1≤1 \leq n ≤500\leq 500
  • −5000≤-5000 \leq Node.Value ≤5000\leq 5000
  • 1≤1 \leq left ≤\leq right ≤\leq n

Examples

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Understand the problem

Let’s take a moment to make sure you’ve correctly understood the problem. The quiz below helps you check if you’re solving the correct problem:

Reverse Linked List II

1.

What is the output if the following linked list and left and right values are given as input?

linked list = 8 → 0 → 6 → 1 → 0 → 7 → 8 → 2

left = 1, right = 5

A.

2 → 8 → 7 → 0 → 1 → 6 → 0 → 8

B.

8 → 0 → 6 → 2 → 8 → 7 → 0 → 1

C.

0 → 1 → 6 → 0 → 8 → 7 → 8 → 2

D.

0 → 8 → 6 → 1 → 0 → 7 → 8 → 2

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Figure it out!

We have a game for you to play. Rearrange the logical building blocks to develop a clearer understanding of how to solve this problem.

Sequence - Vertical
Drag and drop the cards to rearrange them in the correct sequence.
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Try it yourself

Implement your solution in the following coding playground.

Go
usercode > Solution.go
// Definition for a Linked List node



// type ListNode struct {

// 	Val  int

// 	Next *ListNode

// }



package main

import (. "golang-test-code/ds_v1/LinkedList")



func reverseBetween(head *ListNode, left int, right int) *ListNode {

	

	// Replace this placeholder return statement with your code



	return new(ListNode)

}
Reverse Linked List II